Looking at the reference, it's easy to see where you're painting has gone awry . . .

- the upper lip is too thin
- the whole face needs to be rounder, wider
- the colouring needs to have the contrast dropped . . . the right side of her face is looking too red (did you use burn? if you did you might have to paint it the right colour) . . . lipstick colour needs to be less contrasty too, the palette has to be limited more (less contrast again) with the hair, i think the whole thing needs to be more yellow . . . even the teeth
- i agree, the ear is too low, and it needs to be fleshed out more
- hairline needs to be softened
- middle of the two front teeth doesnt' aline with where you've drawn the middle of the nose

- oh, and drop her left (her left) eye a tad, or else you might make this woman look like the poor girl on the cover of this month's Maxim . . .